Process and apparatus for forming overwrap container using clamping and reforming

Abstract

A method for forming an overwrap container includes the steps of a) providing a base container having a first side seam on a side wall that extends along a longitudinal axis to define an internal volume, and a bottom secured to the side wall; b) providing the side wall of the base container with connecting elements on an outer periphery of the side wall; c) providing an overwrap having a second side seam over the side wall of the base container such that the overwrap is joined in spaced apart relationship by the connecting elements to the side wall of the base container; d) clamping the overwrap to the base container along the second side seam to form a first compressed area; e) clamping the overwrap to the base container in an area 180° removed from the second side seam to form a second compressed area: and f) reforming the second compressed area to define an overwrap container having a substantially uniform spacing and air gap between the base container and the overwrap except in the first compressed area.

What is claimed is: 
     
         1 . An apparatus for producing an overwrap container comprising:
 a first mechanized arrangement configured to provide a base container having a side wall and a bottom connected thereto, the side wall being formed with a first side seam extending longitudinally thereof; and   a second mechanized arrangement connected with the first mechanized arrangement and configured to provide a set of connecting elements on the side wall of the base container, and configured to position an overwrap having a second side seam around the side wall of the base container such that the side wall of the base container is joined in spaced apart relationship to the overwrap,   the second mechanized arrangement including a clamping apparatus configured to clamp the overwrap to the base container along the second side seam to form a first compressed area, and to clamp the overwrap to the base container in an area 180° removed from the second side seam to form a second compressed area;   the second mechanized arrangement further including a reforming arrangement reforming the second compressed area to define an overwrap container having a substantially uniform spacing and air gap between the overwrap and the base container except in the first compressed area.   
     
     
         2 . The apparatus of  claim 1 , wherein the second mechanized arrangement includes a set of rotary turrets having mandrels for receiving the base container and transferring the base container to stations at which the connecting elements are applied, and at which the overwrap is joined to the side wall of the base container. 
     
     
         3 . The apparatus of  claim 1 , wherein the connecting elements are applied by a radial glue applicator in the form of a heated glue. 
     
     
         4 . The apparatus of  claim 1 , wherein the reforming arrangement includes a vacuum reformer. 
     
     
         5 . An apparatus for producing an overwrap container comprising:
 a first mechanized arrangement configured to provide a base container having a side wall and a bottom connected thereto, the side wall being formed with a first side seam extending longitudinally thereof; and   a second mechanized arrangement connected with the first mechanized arrangement and configured to provide a set of connecting elements on the side wall of the base container except for an adhesive-free area at a location along the side wall of the base container reserved for clamping, and configured to position an overwrap having a second side seam around the side wall of the base container such that the second side seam is in an area 180° removed from the adhesive-free area, and such that the side wall of the base container is joined in spaced apart relationship to the overwrap except in the adhesive-free area along the side wall of the base container,   the second mechanized arrangement including a clamping apparatus configured to clamp the overwrap to the base container along the second side seam to form a first compressed area, and to clamp the overwrap to the base container in the area 180° removed from the second side seam and coextensive with the adhesive-free area to form a second compressed area;   the second mechanized arrangement further including a reforming arrangement reforming the second compressed area to define an overwrap container having a substantially uniform spacing and air gap between the overwrap and the base container except in the first compressed area.   
     
     
         6 . The apparatus of  claim 5 , wherein the connecting elements are applied by a radial glue applicator in the form of a heated glue. 
     
     
         7 . The apparatus of  claim 5 , wherein the reforming arrangement includes a vacuum reformer. 
     
     
         8 . An overwrap container comprising:
 a base container having a first side seam extending longitudinally along a side wall being provided with connecting elements on an outer periphery of the side wall, and   an overwrap positioned over the side wall of the base container such that the overwrap is joined in spaced apart relationship by the connecting elements to the side wall of the base container, the overwrap having a second side seam,   the overwrap being clamped to the base container along the second side seam to form a first compressed area, the overwrap being further clamped to the base container in an area 180° removed from the second side seam to form a second compressed area,   wherein the second compressed area is configured to be reformed to define an overwrap container having a substantially uniform spacing and air gap between the base container and the overwrap except in the first compressed area.   
     
     
         9 . An overwrap container comprising:
 a base container having a first side seam extending longitudinally along a side wall being provided with connecting elements on an outer periphery of the side wall except for an adhesive-free area at a location along the side wall of the base container reserved for clamping, and   an overwrap provided with a second side seam and provided over the side wall of the base container such that the second side seam is in an area 180° removed from the adhesive-free area and such that the overwrap is joined in spaced apart relationship by the connecting elements to the side wall of the base container except in the adhesive-free area along the side wall of the base container,   the overwrap being clamped to the base container along the second side seam to form a first compressed area, the overwrap further being clamped to the base container in the area 180° removed from the second side seam and coextensive with the adhesive-free area to form a second compressed area,   wherein the second compressed area is configured to be reformed to define an overwrap container having a substantially uniform spacing and air gap between the base container and the overwrap except in the first compressed area.